Maybe not directly from research into sunbeds, but just the harmful effects of UV rays in general.

Basically, I find it weird that no one tackles the whole idea of 'tanned = good' when it's literally just burning your skin. Stupid beauty standard that should be stamped out (along with all the other damaging beauty standards).

hormone related zit on my face the other week, and I had been in the gym for yoga, and during Downward Dog so much blood rushed to my head, I though the spot was going to implode on itself and take my chin off with it./ So after class I decided to pop 2 quid in the stand up sunbed in the ladies changing room for a quick 4 minute blast, which usually eradicates a spot, but there was a sign on the cubicle saying they'd removed the sunbed now on health and safety grounds. I still have the fucking spot.
They are horrible things sunbeds but unless you're ginger the odd one now and again is not likely to kill you. you can spot people that use them regularly a mile off though, it's not a very nice look and they seem to go a colour that the sun itself would never actually turn you.

used exclusively by terrible people but banning would just push it underground.

Imagine walking through Camden at night, people with unnaturally browned skin hissing at your from darkened alleys 'hey man, need some sun?', 'looking to scor(ch)?', 'wanna get tanned?' etc
It would cause more problems tbh.